Why do I find it so hard to "crack down" on parents?

[Momof4]

Haha, nope, I don't let a problem fester and drive me crazy, I tell the parents about the issues with the children daily. That way if it's an ongoing problem and they have heard it come out of my mouth a hundred times they know why I'm reaching the end of my rope. I've had parents really start to help me with a problem with their child after I have said the same thing over and over and they see my exhaustion and frustration. I'm one of those people who says exactly what I mean and what I'm thinking shows on my face. So when the parents say something so upsetting to me they can see that I'm upset. I'm honest, straightforward and my clients respect me for that. There is no hidden agenda or sarcasm or subtle hints. My words verbally and written are my thoughts.

To tell you the truth, I had horrible problems in my first year, but I implemented my contract and learned to be tough about it and now any time I have an issue arise I simply say 'according to our contract that you signed and read ............' I just had a Mom who had to be told to reread the toilet training part, but otherwise I haven't had problems in years with payment or anything to do with breaking my rules. I did get mad at a Dad who announced he was going to use 1/2 an hour extra a day for a while without ASKING me, but he stopped, because as I said, my face shows what I think and my face said 'WHAT?'.